Malicious PDF — malware analysis report

Static analysis result for SHA-256 683632f2c384a29c…

MALICIOUS

PDF

37.4 KB Created: 2020-09-16 21:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80a10a03875d42f475a0bf701e432d0e SHA-1: 20ce84fbd55bd8443a0a2d317e41693923c9a053 SHA-256: 683632f2c384a29c22692773433dfea5c63f89319f5564ef26f2edcb9f0ee176
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a significant number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest a link farm or SEO manipulation tactic, potentially leading to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/wix?keyword=l+blends+picture+cards In PDF document text
    • http://files.easterndistrictbudgie.com/uploads/1/3/1/8/131871651/robitiripuga-wupumiwediku-karisives.pdfIn PDF document text
    • http://sinedawe.kahua-ranch.com/uploads/1/3/1/0/131071243/8715333.pdfIn PDF document text
    • http://files.toowoombakoalarescue.org/uploads/1/3/1/3/131383510/raroku.pdfIn PDF document text
    • http://netoduwu.penguinslax.com/uploads/1/3/0/9/130969057/9c0dc67c8d800.pdfIn PDF document text
    • http://gumovufo.sardisdoorway.com/uploads/1/3/2/8/132814930/6956819.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a839446c-33f1-4011-8cec-647f2cd88f45.filesusr.com/ugd/38eac1_63f14b3b257f466ba019821bac55fdea.pdf?index=trueIn PDF document text
    • https://c51dc86e-16f3-43b2-85fc-0862488fa751.filesusr.com/ugd/daca0d_823c39c8208c4b66a33891bed7c5a7c8.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/2309/6997/files/17491761944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4095/4773/files/36140849682.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51EC 5148 bytes
SHA-256: a8f846a1e6a189373ada0b0d8a741c45e27bdd5191ff43939be7529205c2bdce
font_01_sfnt_off00006372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6372 11736 bytes
SHA-256: 918e4f21417faa4398c9be7e9c01f93cb248c62518b6436797a40009b397c0c0

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